CVEvulnerability

CVE-2026-54784

7.4 HIGH Published 2026-07-08 Modified 2026-07-10 Official page ↗
Status
Deferred
Published
2026-07-08
Last modified
2026-07-10
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.4 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Weaknesses
CWE-311, CWE-523

Description

CoreWCF is a port of the service side of Windows Communication Foundation (WCF) to .NET Core. In version 1.9.0, CoreWCF SPNEGO SecurityContextToken negotiation can expose the proof key recovered from the RSTR when TransportWithMessageCredential with Windows client credentials and session establishment are used, allowing an observer to impersonate the authenticated Windows principal and decrypt or forge WS-SecureConversation traffic. This issue is fixed in version 1.9.1.

Related

Weakness · CWE (2)

  • CWE-311 Missing Encryption of Sensitive Data weakness
  • CWE-523 Unprotected Transport of Credentials weakness

References